gcc/testsuite/gcc.target/i386/excess-precision-1.c

   1 /* Excess precision tests.  Test that excess precision is carried
   2    through various operations.  */
   3 /* { dg-do run } */
   4 /* { dg-options "-O2 -mfpmath=387 -fexcess-precision=standard" } */
   5
   6 #include <float.h>
   7
   8 extern void abort (void);
   9 extern void exit (int);
  10
  11 volatile float f1 = 1.0f;
  12 volatile float f2 = 0x1.0p-30f;
  13 volatile float f3 = 0x1.0p-60f;
  14 volatile double d1 = 1.0;
  15 volatile double d2 = 0x1.0p-30;
  16 volatile double d3 = 0x1.0p-60;
  17 volatile float fadd1 = 1.0f + 0x1.0p-30f;
  18 volatile double dadd2 = 1.0 + 0x1.0p-30 + 0x1.0p-60;
  19 volatile long double ldadd1 = 1.0l + 0x1.0p-30l;
  20 volatile long double ldadd2 = 1.0l + 0x1.0p-30l + 0x1.0p-60l;
  21
  22 void
  23 test_add (void)
  24 {
  25   if (f1 + f2 != ldadd1)
  26     abort ();
  27   if (f1 + f2 + f3 != ldadd2)
  28     abort ();
  29   if (d1 + d2 != ldadd1)
  30     abort ();
  31   if (d1 + d2 + d3 != ldadd2)
  32     abort ();
  33   if (f1 + d2 + f3 != ldadd2)
  34     abort ();
  35   if (f1 + f2 == fadd1)
  36     abort ();
  37   if (f1 + f2 <= fadd1)
  38     abort ();
  39   if (f1 + f2 < fadd1)
  40     abort ();
  41   if (d1 + d2 + d3 == dadd2)
  42     abort ();
  43   if (!(d1 + d2 + d3 > dadd2))
  44     abort ();
  45   if (!(d1 + d2 + d3 >= dadd2))
  46     abort ();
  47 }
  48
  49 volatile long double ldsub1 = 1.0l - 0x1.0p-30l;
  50 volatile long double ldsub2 = 1.0l - 0x1.0p-30l - 0x1.0p-60l;
  51
  52 void
  53 test_sub (void)
  54 {
  55   if (f1 - f2 != ldsub1)
  56     abort ();
  57   if (f1 - f2 - f3 != ldsub2)
  58     abort ();
  59   if (d1 - d2 != ldsub1)
  60     abort ();
  61   if (d1 - d2 - d3 != ldsub2)
  62     abort ();
  63   if (f1 - d2 - f3 != ldsub2)
  64     abort ();
  65   if (+(f1 - d2 - f3) != ldsub2)
  66     abort ();
  67   if (-(f1 - d2 - f3) != -ldsub2)
  68     abort ();
  69 }
  70
  71 volatile float flt_min = FLT_MIN;
  72 volatile double dbl_min = DBL_MIN;
  73 volatile long double flt_min2 = (long double)FLT_MIN * (long double)FLT_MIN;
  74 volatile long double dbl_min3 = (long double)DBL_MIN * (long double)DBL_MIN * (long double)DBL_MIN;
  75
  76 void
  77 test_mul (void)
  78 {
  79   if (flt_min * flt_min != flt_min2)
  80     abort ();
  81   if (flt_min * flt_min == 0)
  82     abort ();
  83   if (flt_min * flt_min == 0)
  84     abort ();
  85   if (!(flt_min * flt_min))
  86     abort ();
  87   if (dbl_min * dbl_min * dbl_min != dbl_min3)
  88     abort ();
  89   if ((long double)(dbl_min * dbl_min * dbl_min) != dbl_min3)
  90     abort ();
  91   if ((0, dbl_min * dbl_min * dbl_min) != dbl_min3)
  92     abort ();
  93   if (dbl_min * dbl_min * dbl_min == 0)
  94     abort ();
  95   if ((flt_min * flt_min ? dbl_min * dbl_min * dbl_min : 0) == 0)
  96     abort ();
  97   if ((flt_min * flt_min ? : 0) == 0)
  98     abort ();
  99 }
 100
 101 volatile float f4 = 0x1.0p100f;
 102 volatile double d4 = 0x1.0p100;
 103 volatile long double flt_div = 0x1.0p100l / (long double) FLT_MIN;
 104 volatile long double dbl_div = 0x1.0p100l / (long double) DBL_MIN;
 105
 106 void
 107 test_div (void)
 108 {
 109   if (f4 / flt_min != flt_div)
 110     abort ();
 111   if (d4 / dbl_min != dbl_div)
 112     abort ();
 113 }
 114
 115 volatile float f5 = 0x1.0p30;
 116
 117 void
 118 test_cast (void)
 119 {
 120   if ((int)(f1 + f5) != 0x40000001)
 121     abort ();
 122 }
 123
 124 volatile float _Complex f1c = 1.0f + 1.0if;
 125 volatile float _Complex f2c = 0x1.0p-30f + 0x1.0p-31if;
 126 volatile float _Complex f3c = 0x1.0p-60f + 0x1.0p-59if;
 127 volatile double _Complex d1c = 1.0 + 1.0i;
 128 volatile double _Complex d2c = 0x1.0p-30 + 0x1.0p-31i;
 129 volatile double _Complex d3c = 0x1.0p-60 + 0x1.0p-59i;
 130 volatile long double _Complex ldadd1c = 1.0l + 0x1.0p-30l + 1.0il + 0x1.0p-31il;
 131 volatile long double _Complex ldadd2c = 1.0l + 0x1.0p-30l + 0x1.0p-60l + 1.0il + 0x1.0p-31il + 0x1.0p-59il;
 132 volatile long double _Complex ldadd2cc = 1.0l + 0x1.0p-30l + 0x1.0p-60l - 1.0il - 0x1.0p-31il - 0x1.0p-59il;
 133 volatile float _Complex flt_minc = FLT_MIN;
 134 volatile double _Complex dbl_minc = DBL_MIN;
 135 volatile float _Complex f4c = 0x1.0p100f;
 136 volatile double _Complex d4c = 0x1.0p100;
 137
 138 void
 139 test_complex (void)
 140 {
 141   if (f1c + f2c != ldadd1c)
 142     abort ();
 143   if (f1c + f2c + f3c != ldadd2c)
 144     abort ();
 145   if (d1c + d2c != ldadd1c)
 146     abort ();
 147   if (d1c + d2c + d3c != ldadd2c)
 148     abort ();
 149   if (__real__ (f1c + f2c + f3c) != ldadd2)
 150     abort ();
 151   if (__imag__ (d1c + d2c + d3c) != __imag__ ldadd2c)
 152     abort ();
 153   if (~(d1c + d2c + d3c) != ldadd2cc)
 154     abort ();
 155   /* The following call libgcc functions and so would fail unless they
 156      call those for long double.  */
 157   if (flt_minc * flt_minc != flt_min2)
 158     abort ();
 159   if (dbl_minc * dbl_minc * dbl_minc != dbl_min3)
 160     abort ();
 161   if (f4c / flt_minc != flt_div)
 162     abort ();
 163   if (d4c / dbl_minc != dbl_div)
 164     abort ();
 165   if (f4 / flt_minc != flt_div)
 166     abort ();
 167   if (d4 / dbl_minc != dbl_div)
 168     abort ();
 169   if (f4c / flt_min != flt_div)
 170     abort ();
 171   if (d4c / dbl_min != dbl_div)
 172     abort ();
 173 }
 174
 175 int
 176 main (void)
 177 {
 178   test_add ();
 179   test_sub ();
 180   test_mul ();
 181   test_div ();
 182   test_cast ();
 183   test_complex ();
 184   exit (0);
 185 }